Here in the Atlanta area it was rumored a year or so ago that Showcase, the premier brick and mortar store remaining in the area, had a small Pentax presence. When I last visited for some emergency film ($8.00 plus for Ilford 24exp!!) I didn't see any. That said, they are nice folks there, quite knowledgeable. I walked in with my 645n in search of, IIRC, a Nikon D3 eyepiece which I gathered would fit the 645. The guy I worked with was most helpful; he'd owned a 645n for wedding shoots and spoke highly of it. They didn't have the eyepiece, sadly. Their website which I checked just a moment ago doesn't mention Pentax. While they carry used Nikon, Canon, and Olympus, no Pentax gear.
For used gear I use Wings Camera, which is 100 years old!!
Mike is cordial, knows his stuff, and has a reasonable selection of used Pentax stuff. Let's support local business!
Wolf/Ritz camera which used to carry Pentax has of course melted down. Their flagship store is but a shadow of its former self. I used to shop their local branch only 2 miles from me; good staff, cordial, knowledgeable. Good prices on snapshot prints. A fair amount of staff turnover, perhaps a sign of the trouble brewing. Their website lists a good range of Pentax, but the sole remaining store in the Atlanta area when last I visited had no Pentax, but a rather surly staff. One store in a major metro area....!